Kymlicka, Will, author
Clarendon Press, 1990
Buku Teks
Preiss, Julian, author
Routledge, 2013
Buku Teks
Reulet, Anibal Sanchez
University of Mexico Press, 1954
Buku Teks
Hales, Steven D., author
Wiley Balckwell, 2013
Buku Teks
Maritain, Jacques, 1882-1973, author
Rowman & Littlefield Publishers, 2005
Buku Teks